Provides a Ceylonic EntityManager for use with the Java
Persistence API. An EntityManager may be instantiated
directly, given an instance of
[[javax.persistence.EntityManager|javax.persistence::EntityManager]].

Note: it's perfectly possible to directly use the
javax.persistence.EntityManager from Ceylon, but in that
case, it's necessary to explicitly convert arguments to
[[java.lang.Long|java.lang::Long]],
[[java.lang.Double|java.lang::Double]],
[[java.lang.String|java.lang::String]],
[[java.lang.Character|java.lang::Character]], or
[[java.lang.Boolean|java.lang::Boolean]].